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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
distribution modelling
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: based on EPIWIN 4.0

Data source

Reference
Reference Type:
other: calculation
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Model:
calculation according to Mackay, Level III
Calculation programme:
EPISUIT, v.4.0
Release year:
2 008
Media:
air - biota - sediment(s) - soil - water

Test material

Constituent 1
Chemical structure
Reference substance name:
8,9,10-trinorborn-2-ene
EC Number:
207-866-0
EC Name:
8,9,10-trinorborn-2-ene
Cas Number:
498-66-8
Molecular formula:
C7H10
IUPAC Name:
Bicyclo-[2.2.1]-hept-2-ene

Results and discussion

Percent distribution in media

Air (%):
0.192
Water (%):
81.3
Soil (%):
17.6
Sediment (%):
0.918

Any other information on results incl. tables

Level III Fugacity Model:

Mass Amount         Half-Life         Emissions

(percent)             (hr)                   (kg/hr)

Air             0.192                     0.125                  1000

Water          81.3                        360                      1000

Soil            17.6                        720                      1000

Sediment      0.918                3.24e+003                0

Persistence Time: 75.9 hr

Volatilization from Water:

Henry LC: 0.0388 atm-m3/mole (estimated by Bond SAR Method)

Half-Life from Model River:     1.005 hours

Half-Life from Model Lake :     92.33 hours  (3.847 days)

 

Removal In Wastewater Treatment:

Total removal:             94.65 percent

Total biodegradation:       0.08 percent

Total sludge adsorption:   18.10 percent

Total to Air:              76.48 percent

(using 10000 hr Bio P,A,S)

Atmospheric Oxidation (25 deg C) [AopWin v1.92]:

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 61.1919 E-12 cm3/molecule-sec

Half-Life =    0.175 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life =    2.098 Hrs

Ozone Reaction:

OVERALL Ozone Rate Constant =   20.000000 E-17 cm3/molecule-sec

Half-Life =    0.057 Days (at 7E11 mol/cm3)

Half-Life =     1.375 Hrs

Fraction sorbed to airborne particulates (phi):

2.07E-008 (Junge-Pankow, Mackay avg)

1.24E-007 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Applicant's summary and conclusion

Conclusions:
Norbornene will be primarily distributed to the aqueous compartment.
Executive summary:

Model calculations on fugacity show that the dominant compartement is water (ca. 81%), followed by soil (ca. 18%). Presence in air and sediment is negliglible. Volatilisation from water was calculated with a half live of ca. .1h (river model) and ca. 4 days (lake model).

Removal from Wastewater Treatment was calculated with a total removal of 95%, removal to air was shown to be the dominant process. Atmospheric oxidation at 25°C was calculated with AopWin v1.92 and half lifes for hydroxyl radicals reaction and ozone reaction were calculated as ca. 2.1 and 1.4 h respectively.